theitroad>C Programming Basic>Standard Library Functions>string.h>C programming string.h function - int memcmp(const void *str1, const void *str2, size_t n)
- Standard Library Functions
- ctype.h
- C programming ctype.h function - int isalnum(int c)
- C programming ctype.h function - int isalpha(int c)
- C programming ctype.h function - int iscntrl(int c)
- C programming ctype.h function - int isdigit(int c)
- C programming ctype.h function - int isgraph(int c)
- C programming ctype.h function - int islower(int c)
- C programming ctype.h function - int isprint(int c)
- C programming ctype.h function - int ispunct(int c)
- C programming ctype.h function - int isspace(int c)
- C programming ctype.h function - int isupper(int c)
- C programming ctype.h function - int isxdigit(int c)
- C programming ctype.h function - int tolower(int c)
- C programming ctype.h function - int toupper(int c)
- locale.h
- C programming locale.h function - char *setlocale(int category, const char *locale)
- C programming locale.h function - struct lconv *localeconv(void)
- math.h
- C programming math.h function - double exp(double x)
- C programming math.h function - double frexp(double x, int *exponent)
- C programming math.h function - double ldexp(double x, int exponent)
- C programming math.h function - double log(double x)
- C programming math.h function - double log10(double x)
- C programming math.h function - double modf(double x, double *integer)
- C programming math.h function - double asin(double x)
- C programming math.h function - double atan(double x)
- C programming math.h function - double atan2(double y, double x)
- C programming math.h function - double cos(double x)
- C programming math.h function - double cosh(double x)
- C programming math.h function - double sin(double x)
- C programming math.h function - double sinh(double x)
- C programming math.h function - double tanh(double x)
- C programming math.h function - double acos(double x)
- setjmp.h
- C programming setjmp.h function - void longjmp(jmp_buf environment, int value)
- signal.h
- C programming signal.h function - void (*signal(int sig, void (*func)(int)))(int)
- C programming signal.h function - int raise(int sig)
- stdarg.h
- C programming stdarg.h Macro - void va_start(va_list ap, last_arg)
- C programming stdarg.h Macro - type va_arg(va_list ap, type)
- C programming stdarg.h Macro - void va_end(va_list ap)
- stdio.h
- C programming stdio.h function - int fclose(FILE *stream)
- C programming stdio.h function - void clearerr(FILE *stream)
- C programming stdio.h function - int feof(FILE *stream)
- C programming stdio.h function - int ferror(FILE *stream)
- C programming stdio.h function - int fflush(FILE *stream)
- C programming stdio.h function - int fgetpos(FILE *stream, fpos_t *pos)
- C programming stdio.h function - FILE *fopen(const char *filename, const char *mode)
- C programming stdio.h function - size_t fread(void *ptr, size_t size, size_t nmemb, FILE *stream)
- C programming stdio.h function - FILE *freopen(const char *filename, const char *mode, FILE *stream)
- C programming stdio.h function - int fseek(FILE *stream, long int offset, int whence)
- C programming stdio.h function - int fsetpos(FILE *stream, const fpos_t *pos)
- C programming stdio.h function - long int ftell(FILE *stream)
- C programming stdio.h function - size_t fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream)
- C programming stdio.h function - int remove(const char *filename)
- C programming stdio.h function - int rename(const char *old_filename, const char *new_filename)
- C programming stdio.h function - void rewind(FILE *stream)
- C programming stdio.h function - void setbuf(FILE *stream, char *buffer)
- C programming stdio.h function - int setvbuf(FILE *stream, char *buffer, int mode, size_t size)
- C programming stdio.h function - FILE *tmpfile(void)
- C programming stdio.h function - char *tmpnam(char *str)
- C programming stdio.h function - int fprintf(FILE *stream, const char *format, ...)
- C programming stdio.h function - int printf(const char *format, ...)
- C programming stdio.h function - int sprintf(char *str, const char *format, ...)
- C programming stdio.h function - int vfprintf(FILE *stream, const char *format, va_list arg)
- C programming stdio.h function - int vprintf(const char *format, va_list arg)
- C programming stdio.h function - int vsprintf(char *str, const char *format, va_list arg)
- C programming stdio.h function - int fscanf(FILE *stream, const char *format, ...)
- C programming stdio.h function - int scanf(const char *format, ...)
- C programming stdio.h function - int sscanf(const char *str, const char *format, ...)
- C programming stdio.h function - int fgetc(FILE *stream)
- C programming stdio.h function - char *fgets(char *str, int n, FILE *stream)
- C programming stdio.h function - int fputc(int char, FILE *stream)
- C programming stdio.h function - int fputs(const char *str, FILE *stream)
- C programming stdio.h function - int getc(FILE *stream)
- C programming stdio.h function - int getchar(void)
- C programming stdio.h function - char *gets(char *str)
- C programming stdio.h function - int putc(int char, FILE *stream)
- C programming stdio.h function - int putchar(int char)
- C programming stdio.h function - int puts(const char *str)
- C programming stdio.h function - int ungetc(int char, FILE *stream)
- C programming stdio.h function - void perror(const char *str)
- stdlib.h
- C programming stdlib.h function - double atof(const char *str)
- C programming stdlib.h function - int atoi(const char *str)
- C programming stdlib.h function - long int atol(const char *str)
- C programming stdlib.h function - double strtod(const char *str, char **endptr)
- C programming stdlib.h function - long int strtol(const char *str, char **endptr, int base)
- C programming stdlib.h function - unsigned long int strtoul(const char *str, char **endptr, int base)
- C programming stdlib.h function - void *calloc(size_t nitems, size_t size)
- C programming stdlib.h function - void free(void *ptr)
- C programming stdlib.h function - void *malloc(size_t size)
- C programming stdlib.h function - void *realloc(void *ptr, size_t size)
- C programming stdlib.h function - void abort(void)
- C programming stdlib.h function - int atexit(void (*func)(void))
- C programming stdlib.h function - void exit(int status)
- C programming stdlib.h function - char *getenv(const char *name)
- C programming stdlib.h function - int system(const char *string)
- C programming stdlib.h function - void *bsearch(const void *key, const void *base, size_t nitems, size_t size, int (*compar)(con
- C programming stdlib.h function - void qsort(void *base, size_t nitems, size_t size, int (*compar)(const void , const void))
- C programming stdlib.h function - int abs(int x)
- C programming stdlib.h function - div_t div(int numer, int denom)
- C programming stdlib.h function - long int labs(long int x)
- C programming stdlib.h function - ldiv_t ldiv(long int numer, long int denom)
- C programming stdlib.h function - int rand(void)
- C programming stdlib.h function - void srand(unsigned int seed)
- C programming stdlib.h function - int mblen(const char *str, size_t n)
- C programming stdlib.h function - size_t mbstowcs(schar_t *pwcs, const char *str, size_t n)
- C programming stdlib.h function - int mbtowc(whcar_t *pwc, const char *str, size_t n)
- C programming stdlib.h function - size_t wcstombs(char *str, const wchar_t *pwcs, size_t n)
- C programming stdlib.h function - int wctomb(char *str, wchar_t wchar)
- string.h
- C programming string.h function - void *memchr(const void *str, int c, size_t n)
- C programming string.h function - int memcmp(const void *str1, const void *str2, size_t n)
- C programming string.h function - void *memcpy(void *dest, const void *src, size_t n)
- C programming string.h function - void *memmove(void *dest, const void *src, size_t n)
- C programming string.h function - void *memset(void *str, int c, size_t n)
- C programming string.h function - char *strcat(char *dest, const char *src)
- C programming string.h function - char *strncat(char *dest, const char *src, size_t n)
- C programming string.h function - char *strchr(const char *str, int c)
- C programming string.h function - int strcmp(const char *str1, const char *str2)
- C programming string.h function - int strncmp(const char *str1, const char *str2, size_t n)
- C programming string.h function - int strcoll(const char *str1, const char *str2)
- C programming string.h function - char *strcpy(char *dest, const char *src)
- C programming string.h function - char *strncpy(char *dest, const char *src, size_t n)
- C programming string.h function - size_t strcspn(const char *str1, const char *str2)
- C programming string.h function - char *strerror(int errnum)
- C programming string.h function - size_t strlen(const char *str)
- C programming string.h function - char *strpbrk(const char *str1, const char *str2)
- C programming string.h function - char *strrchr(const char *str, int c)
- C programming string.h function - size_t strspn(const char *str1, const char *str2)
- C programming string.h function - char *strstr(const char *haystack, const char *needle)
- C programming string.h function - char *strtok(char *str, const char *delim)
- C programming string.h function - size_t strxfrm(char *dest, const char *src, size_t n)
- time.h
- C programming time.h function - char *asctime(const struct tm *timeptr)
- C programming time.h function - clock_t clock(void)
- C programming time.h function - char *ctime(const time_t *timer)
- C programming time.h function - double difftime(time_t time1, time_t time2)
- C programming time.h function - struct tm *gmtime(const time_t *timer)
- C programming time.h function - struct tm *localtime(const time_t *timer)
- C programming time.h function - time_t mktime(struct tm *timeptr)
- C programming time.h function - size_t strftime(char *str, size_t maxsize, const char *format, const struct tm *timeptr)
- C programming time.h function - time_t time(time_t *timer)
C programming string.h function - int memcmp(const void *str1, const void *str2, size_t n)
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The memcmp() function is used to compare the first n bytes of two memory areas pointed to by str1 and str2. The function returns an integer less than, equal to, or greater than zero if the first n bytes of str1 are found, respectively, to be less than, to match, or be greater than the first n bytes of str2.
The function has the following signature:
int memcmp(const void *str1, const void *str2, size_t n);
Here, str1 and str2 are pointers to the memory areas to be compared, and n is the number of bytes to compare. The function returns an integer value that indicates the result of the comparison.